On Feb 15, 2012, at 11:14 AM, David M. Douglass wrote: > Is it safe to assume that the Azimuth's are stated relative to TRUE NORTH and > the Altitude is stated in Degrees ???? I don't think so. I assumed the azimuth is given in relation to the direction of Mecca, and the altitude in Extended Chubby Fist Heights. Joe Bergeron Fellow, International Association of Astronomical Artists http://www.joebergeron.com -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.